Background:Adolescence is a period in which adolescents become matured physically and psychologically, so they are very susceptible to deviant behavior such as bullying actors and victims. Bullying victims usually use coping mechanisms to divert the feelings of stress faced by means of problem focused coping and emotional focused coping. In Indonesia bullying behavior in schools increased by 4% from 461 cases in 2014 to 478 cases in 2015. Yogyakarta Province has cases of violence against children aged 10-18 years conducted by peers at 50.8% Research Objective: The purpose of this study was to determine the coping mechanism used by middle school students with a history of bullying. Research Method: This type of research is descriptive. The subjects were 147 teenagers student at SMP Negeri 16 Yogyakarta and SMP Negeri 11 Yogyakarta who experienced bullying. The data collection technique was done by questionnaire The Revised Olweus Bully / Victim Questionner and AdolescentCoping Orientation for problem experience. The sampling technique is simple random sampling. Results: The results showed that the majority of respondents were dominated by class 2018 or class VII students (53.7%), women (55.1%), 13 years old (48.3%), living with fathers and mothers (98, 1%). The results of the analysis conducted show that adolescents with a history of bullying use problem focused coping (67.3%) in solving problems. Conclusion: Most coping mechanisms used by adolescents when getting bullying behavior use problem focused coping. Teenagers who use problem focused coping are expected to be able to improve coping well when facing stressors so as not to lead to emotional focused coping behavior.